Socially distant
I believe the answer is:
aloof
'socially distant' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for aloof that I've seen before include "Unapproachable, distant" , "Unfriendly or distant like a fool" , "Coldly distant" , "Standoffish like a fool" , "Blood deficiency" .)